1988年世界卫生大会决定全球根除脊髓灰质炎(脊灰,WPV)。随着全球脊灰根除计划的实施,与野脊灰病毒相关的全球发病数估计从1988年的350 000例减少到2006年的1997例,从来没有停止过传播的国家数从125个减少到4个(阿富汗、印度、尼日利亚和巴基斯坦)。1999年10月,最后观察到2型WP The 1988 World Health Assembly decided that the global polio eradication (poliovirus, WPV). With the implementation of the Global Polio Eradication Program, the global incidence of the disease associated with the poliovirus has been reduced from 350,000 in 1988 to about 1997 in 2006, and the number of countries that have never stopped spreading from 125 to 4 (Afghanistan, India, Nigeria and Pakistan). In October 1999, a Type 2 WP was finally observed